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<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1210302
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<head>
  <title>Test for Bug 1210302</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1210302">Mozilla Bug 936340</a>
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<pre id="test">
<script class="testbody" type="text/javascript">

var beaconUrl = "http://example.com/tests/dom/tests/mochitest/beacon/beacon-preflight-handler.sjs?beacon";

var intervalID = null;

function queryIfBeaconSucceeded() {
  clearInterval(intervalID);
  var xhr = new XMLHttpRequest();
  xhr.open("GET", "beacon-preflight-handler.sjs?verify", true);
  xhr.onload = function() {
    is(xhr.responseText, "green", "SendBeacon should have succeeded after preflight!");
    SimpleTest.finish();
  };
  xhr.onerror = function() {
    ok(false, "xhr request returned error");
    SimpleTest.finish();
  };
  xhr.send();
}

// not enabled by default yet.
SimpleTest.waitForExplicitFinish();
SpecialPowers.pushPrefEnv({'set': [["beacon.enabled", true]]}, beginTest);

function beginTest() {
  var abv = new Uint8Array([0,1,2,3]);
  var blob = new Blob(abv, {type: "application/badness, text/plain"});
  var sent = navigator.sendBeacon(beaconUrl, blob);
  ok(sent, "sending the beacon should start successfully");

  // we have to make sure sending the beacon did not fail, so
  // we have to wait for 2 seconds before we can query the result.
  intervalID = setInterval(queryIfBeaconSucceeded, 2000);
}

</script>
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